The electron shell is also called the principle energy level in chemistry and atomic physics. The shells starting closest to the nucleus names go from shell 1 or shell K, shell 2 or shell L,shell 3 or shell m, etc. Each shell contains a certain amount of electrons the first shell starts with two and the number increases for each shell.
=hey even though this is my own question i found out the answer as i am in high school i looked it up in my science dimensions 2 book (it helps!) the answer is energy levels. How did i not know that /lmaoo!!! :)=
The outer electron shell of an atom is the valence shell.
the valence shell :)
Outer energy level electrons, or valence electron.
The electron configuration of argon is [Ne] 3s2 3p6. From this, we can see that the outer shell contains eight electrons.
When an electron absorbs a single photon of light it moves from its current shell to an outer shell.
Atoms do not always lose electrons. Electrons can be gained too. Atoms always try to have their outer most shell filled, and some atoms such as ones of potassium can easily lose an electron rather than gain an electron. So it would lose an electron to a different atom so that it would have a full outer shell and the other atom would also have a full outer shell.
I think it's the valence shell
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.
when an element has 8 electron in outer shell it is said to be inert. inert gases are called noble gases.
The outer shell is called the valence shell
Valence Electrons
These are the valence electrons.
no it only has 1 electron in the outer shell
Bromine has 7 electrons in its outer shell and needs to gain one electron to have a full outer shell and become an ion. It will gain this electron from an atom that has one electron in its outer shell such as Lithium or Sodium.
valence electrons
the alkali metals have 1 electron in their outer most shell. in order to obtain a full outer shell they have to lose this electron. so when they react with another metal they lose this electron and the outer most shell.
There is one electron on cobalts outer shell.
Sodium is in the third group in the periodic table. It meens that sodium has three shell. First shell - 2 electrons, second shell - 8 electrons, third shell (outer energy level) - 1 electron.
I think it is that there is only 1 electron in its outer shell.